Android recyclerView item layout params not working

I'm writing a simple chat UI. I am using a nine-patch file to to this work.

When I first initialize my Adapter with some mock data, it works fine, but if I add something during runtime, the layout inside the recyclerView breaks.

It doesn't throw any errors, though the layout params which I used to set the alignment don't seem to work. Actually, the aligment works, but it's size becomes match_parent rather than wrap_content.

Here's my Adapter code.

public class Adapter_Chat extends RecyclerView.Adapter<Adapter_Chat.Adapter_Chat_ViewHolder> {

private List<ChatMessageModel> data = Collections.EMPTY_LIST;

public Adapter_Chat(List<ChatMessageModel> data) {
    this.data = data;
}

@Override
public Adapter_Chat_ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    retu new Adapter_Chat_ViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_rv_chat_message, parent, false));
}


public void addNewMessage(ChatMessageModel model) {
    data.add(model);
    notifyDataSetChanged();
}

@Override
public void onBindViewHolder(Adapter_Chat_ViewHolder holder, int position) {
    ChatMessageModel item = data.get(position);

    switch (item.getType()) {
        case mine: {
            holder.iv_chat_profileImage.setVisibility(View.INVISIBLE);
            holder.tv_item_chat_message_nameText.setVisibility(View.INVISIBLE);
            holder.tv_item_chat_message_contentText.setBackgroundResource(R.drawable.in_message_bg);
            RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) holder.tv_item_chat_message_contentText.getLayoutParams();
            params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
            params.height = RelativeLayout.LayoutParams.WRAP_CONTENT;
            params.width = RelativeLayout.LayoutParams.WRAP_CONTENT;
            holder.tv_item_chat_message_contentText.setLayoutParams(params);

        }
        break;

        case others: {
            holder.iv_chat_profileImage.setVisibility(View.VISIBLE);
            holder.tv_item_chat_message_nameText.setVisibility(View.VISIBLE);
            holder.tv_item_chat_message_contentText.setBackgroundResource(R.drawable.out_message_bg);
            RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) holder.tv_item_chat_message_contentText.getLayoutParams();
            params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
            params.height = RelativeLayout.LayoutParams.WRAP_CONTENT;
            params.width = RelativeLayout.LayoutParams.WRAP_CONTENT;
            holder.tv_item_chat_message_contentText.setLayoutParams(params);

        }
        break;
    }


    holder.tv_item_chat_message_contentText.setText(item.getMessage().trim());
    holder.tv_item_chat_message_nameText.setText(item.getSender().trim());
}

@Override
public int getItemCount() {
    retu data.size();
}

public class Adapter_Chat_ViewHolder extends RecyclerView.ViewHolder {

    public TextView tv_item_chat_message_nameText, tv_item_chat_message_contentText;
    public ImageView iv_chat_profileImage;

    public Adapter_Chat_ViewHolder(View itemView) {
        super(itemView);
        tv_item_chat_message_contentText = (TextView) itemView.findViewById(R.id.tv_item_chat_message_contentText);
        tv_item_chat_message_nameText = (TextView) itemView.findViewById(R.id.tv_item_chat_message_nameText);
        iv_chat_profileImage = (ImageView) itemView.findViewById(R.id.iv_chat_profileImage);
    }
}
}

And the layout is,

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">

<ImageView
    android:src="@drawable/bg"
    android:scaleType="fitXY"
    android:layout_margin="16dp"
    android:layout_width="48dp"
    android:layout_height="48dp"
    android:id="@+id/iv_chat_profileImage" />

<TextView
    android:id="@+id/tv_item_chat_message_nameText"
    android:text="name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="64dp"
    android:layout_marginTop="16dp" />

<TextView
    android:layout_marginTop="32dp"
    android:layout_marginLeft="64dp"
    android:layout_marginRight="16dp"
    android:gravity="right"
    android:background="@drawable/out_message_bg"
    android:id="@+id/tv_item_chat_message_contentText"
    android:text="content"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

Is there something wrong with my onBindViewHolder method? Isn't changing the alignment of the item supposed to be like this?